Conforms to international standards:EN149: 2001 FFP1 FFP2 CE0194AS/NZS 1716: 1994 NIOSH N95Low breathing resistance with high filtration efficiency.Adopted the polypropylene material, which is without any toxic chemicals or stimulat.Adjustable contoured aluminum nosepiece and a soft inner foam nose cushion help to ensure proper fit and increase worker comfort.Easy-breathing exhalation valve with inner silicon-piece can facilitate the air exchange and increase worker comfort.Special 3-ply design respirator produced from high filtrable and electrostatic material for resisting normal toxic and tiny micro particle.